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hi, there are various ways you can implement this.<br />
<br />
are you trying to reduce the costs calling international, mobiles or all. <br />
<br />
in my opnion using SIP gateway is the most cost-effective solution for international calls
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hi, there are various ways you can implement this.

are you trying to reduce the costs calling international, mobiles or all.

in my opnion using SIP gateway is the most cost-effective solution for international calls

<div>
 To answer, yes and yes. &nbsp;They are looking for cost savings for international calls, and for mobiles..<br />
<br />
Can you point me to succesful immplentations of toll bypass using SIP gateways? &nbsp;(plus any specfics, hardware, software, SIP service providers, etc.)<br />
Thank you
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To answer, yes and yes.  They are looking for cost savings for international calls, and for mobiles..

Can you point me to succesful immplentations of toll bypass using SIP gateways?  (plus any specfics, hardware, software, SIP service providers, etc.)
Thank you

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Thanks! &nbsp;This is a great start.
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I've been asked to do a feasibilty study for using toll-bypass over several locations in the country (and a couple sites in Europe). &nbsp;I'm looking for feedback from people who have implemented toll-bypass, using a variety of methods. &nbsp; First choice is to use the public internet as the actual &quot;backbone&quot; for such a network. &nbsp;I would like to investigate the use of GSM gateways (SIM boxes), Cisco telephony hardware/software (?with Call Manager perhaps if needed?), Asterix servers, etc. &nbsp;How did you do it?<br />
Can I get an idea of what has been used successfully? &nbsp;I'm looking to see what hardware has been used, and what services (ISP, SIP, PRI, POTS, GSM, etc.) has been used to make this happen.
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I've been asked to do a feasibilty study for using toll-bypass over several locations in the country (and a couple sites in Europe).  I'm looking for feedback from people who have implemented toll-bypass, using a variety of methods.   First choice is to use the public internet as the actual "backbone" for such a network.  I would like to investigate the use of GSM gateways (SIM boxes), Cisco telephony hardware/software (?with Call Manager perhaps if needed?), Asterix servers, etc.  How did you do it?
Can I get an idea of what has been used successfully?  I'm looking to see what hardware has been used, and what services (ISP, SIP, PRI, POTS, GSM, etc.) has been used to make this happen.

toll-bypass

Telecommunication occurs when the exchange of information between two or more entities (communication) includes the use of technology. Communication technology uses channels to transmit information (as electrical signals), either over a physical medium (such as signal cables), or in the form of electromagnetic waves. The word is often used in its plural form, telecommunications, because it involves many different technologies.

Telecommunications

The term broadband commonly refers to high-speed Internet access that is always on and faster than the traditional dial-up access. Broadband includes several high-speed transmission technologies such as digital subscriber line (DSL), cable, fiber optics, wireless (for which there is a separate topic), satellite and broadband over powerlines (BPL).

Broadband

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).